Hydraulic press for bobbins.



A. B. MORSE.

HYDRAULIC PRESS FOR BOBBINS.

APPLICATION FILED MAY 10, 1913.

1 ,Q98,5 1 9, Patented June 2, 1914. I

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ALFRED B. MOB/$151, 013 SOUTH EASTON, 1WIASSAGHU$ETTS- HYDRAULIC PRESS FOR BOBBINS.

To all whom it may concern Be it known that I, ALFRED B. Mouse, a citizen of the United States, and resident of douth Easton, county of Bristol, State of lviassachusetts, have invented an Improvement in lrlydraulic Presses for Bobbins, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

My invention relates to pressing bobbins, particularly those intended for use on a lace making machine, or the like, and its object is to provide means which will apply a constant, even, uniform and predetermined pressure upon successive pressings, or sets of bobbins, in preparing the same for use in a machine.

li'leretofore it has been customary to mount a large number of small bobbins as they are filled on a pair of spindles constituting af cage, and then to apply pressure to the top of the bobbins by an ordinary hand or power operated screw press, in order to compress these bobbins, after which they were trans; ferred to a steaming receptacle and from thence to a drier. This prior method was unsatisfactory in failing to provide uni-1 formly condensed bobbins, and consequently resulted in an uneven running of the machines on which said bobbins were subsequently placed.

Therefore my invention comprises means to obviate the difliculties just noted and to compress each successive set or cage of bobbins to the same predetermined extent, and by the application of the same amount of pressure. Preferably I employ a hydraulic press of suitable form and type for this operation, and provide the press with means to cooperate with a cage holding a set of bobbins, together with means to simultaneously stop the continued actuation of the hydraulic press and release the pressure from the bobbins when the dial indicator, or the like, has reached a predetermined point or figure showing the extent in pressure desired to be i applied to the bobbins.

Qther features of the invention, novel combinations of parts, and details of construction, will be hereinafter pointed out and claimed.

Referring to the drawings, wherein is illustrated a preferred embodiment of the invention, Figure 1 is a front view of a hydraulic press equipped with means to,

Specification of Letters Patent.

Application filed May 10, 1913.

Patented June 2, 1914. Serial No. 766,912.

eotiperate with a bobbin holding cage, and illustrating a cage, partly in section with a set of bobbins in position to be operated upon; and F 2 is a plan view of a detail whereby the pressure being applied to the cage may be stopped and simultaneously released by a single throw of the lever in the hand of the operator.

I have preferably utilized a hydraulic press of well-knwn form, having thereon an indicator to show the extent of pressure being applied at any stage. Fuch a press is shown in front view in Fig. 1, wherein a base 1 and cylinder 2 are shown of usual form, a movable plunger 3 fitting within said cylinder and having guides i and 5 bearing against uprights G and 7 carrying a head 8, crmstituting a usual construction. Mounted in suitable journal bearings 9 and 10 in the upper part of the machine is a shaft 11 having on one end thereof fast and loose pulleys 12 and 13 respectively, and at the other end a crank 1 1. T his crank has a pin 15 on which is pivotally secured a rod 16, the lower end being connected by a universal joint 1'? to a pump plunger 18 to 0p crate a pump 19 to furnish power to the cylinder 2 and lift the plunger 8 as is customary. A supply pipe 20 from the pump to the cylinder 2 is also provided, said pipe being connected at 21 with the cylinder, and having said pipe extended to a valve 22. Preferably the pipe 20 is formed with flanges 23, 24; and 25 to facilitate its being bolted to the pump 19, cylinder 2 and valve 22. stem 26, rotation of said stem serving to open and close the valve 22. lVhen the shaft 11 is rotated and the pump 19 actuated to supply pressure to the plunger 3, and rotation of the shaft 11 is then stopped, opening the valve 22 by rotation of the valve stem 26, permits the fluid which has been pumped into the cylinder 2 through the pipe 20 and port 21 to flow backwardly through said pipe 20 and valve 22, back to an original supply tank (not shown) in the ordinary manner.

I have aflixed to the top 8 of the press 2, arms 27 and 28 carrying in their upper portions journal bearings 29 and 30, and have mounted a belt shifter, comprising a shaft 3.1, therein, together with belt engaging arms 32 and 33, which may be adjustably secured to the end of the rod 31 in desired position. 1 also provide a bracket 34L- on the The valve is controlled by a valve arm 28, being vertically bolted to receive the rod 35 therethrough, said rod carrying a plate 36 (see Fig. 2) on which plate is fixed a stud or pin 37.

Adjustably secured to the rod 31 by means of set screws or the like, is an arm 38, with its lower portion slotted as indicated at 39, and of suitable form so that said slot may engage the pin 37 in the upper part of the plate 36, whereby partial rotation of the vertical rod 35 and consequently horizontal swinging of the plate 36 will act to move the arm 38 and rod 31 longitudinally in the bearings 29 and 30, thus shifting the belt from the fast to loose pulley, and vice versa.

In order to actuate the belt shifter and thevalve 22 simultaneously, I preferably arrange the belt shifter and rod 35 as has been described at the right of the press, viewing Fig. 1, and in substantially vertical line with the valve 22. Also I extend the rod 35 downwardly through a second bracket 40, secured to the cylinder 2, and unite the lower end of the rod 35 with the valve stem 26 by a coupling or plate 41. Secured to the rod 35 at a suitable and convenient height is handle 42, so that the operator, by a partial turn of the handle 42 may control the belt shifter and the valve 22 simultaneously. The advantage of thus controlling the belt shifter to stop the actuation of the pump 19 and consequently the increase of power to the cylinder 3, and to release the pressure from said cylinder by opening the valve 22, is of special importance in utilizing a hydraulic press as a means to carry out my invention of applying equal and uniform pressure to successive sets of bobbins. This construction also facilitates the speed of operation, in compressing bobbins as will now be described.

Fitted to the head 8 are two depending hollow sleeves 42 and 43, each sleeve being provided with a recess in its lower portion, as indicated at 44 and 45, which recesses are of slightly greater diameter than the spindles of the bobbin cage to be employed. The cage holding a plurality of bobbins comprises a base 46, a cylinder standard or stem 47, a pair of spindles 48 and 49, a yoke 50, having perforations to fit over the cylinder stem 47 and the two spindles 48 and 49, and a nut 51 threaded on to the standard 47 and holding the yoke 50 in assembled position with its lower edge bearing against the column of bobbins indicated at 52, which are slid over each of the spindles. It is also preferable to equip such a cage with a plurality of metallic guards 53, secured to the base 46, but loose at the top and of somewhat shorter length than that of the spindles carried by the bobbins. The cage being filled with bobbins is positioned by the operator on the top of the plunger 3 and under the sleeves 42 and 43, the recesses 44 and 45 therein permitting the tops of the spindles 48 and 49 to be slid therein, as well as to be removed therefrom when the clearance between the bottom of the sleeve and the cage is insufficient to permit positioning and removal of the cage. The operator then swings the handle 42 to close the valve 22 and shift the belt from the loose pulley to the fast pulley on to the shaft 11, thus actuating the pump 19 to supply hydraulic pressure through the pipe 20 to the cylinder 2. As the plunger 3 rises, the protruding ends of the spindles 48 and 49 are housed within the hollow sleeves 42 43, said sleeves bearing against the yoke 50, and it in turn bearing upon the stack of bobbins 52 on each spindle and compressing them as the plunger 3 rises. The operator by manipulating the nut 51 will then be able to hold the yoke 50 in its lowermost position of movement when the desired limit of pressure has been reached on the Press. In order to enable this extent of pressure to be obtained with accuracy, a suitable indicator or dial 54 is provided, which may also receive and register pressure through a pipe 55 which is in communication with the supply to the pump 19, or any other portion of pressure-receiving part of the system. As soon as the cage with its bobbins has been compressed to the desired degree, the operator swings the lever 42 in the appropriate direction to shift the belt to the loose pulleys on the shaft 11, thus stopping the actuation of the pump 19 and the supply of pressure to the plunger '3 and simultaneously opening the valve 22, and releasing the pressure from the cylinder 2, permitting the fluid to flow out of said cylinder as the plunger descends, usually by its own weight, and facilitating the speedy removal of the compressed cage. In fact, before the plunger has been allowed to descend to its normal position, the cage may be withdrawn from the sleeves 42 and 43 by reason of the recesses 44 and 45, as above explained. Positioning a new cage with its filled bobbins on the plunger 3, the operator is enabled to properly locate the cage with his hands after operating the lever 42 thereby shutting off the valve 22, turning on the power to the shaft 11 and pump 19, then ti htening the nut 51 as the bobbins are compressed during the upward rise of the plunger 3, until the desired degree of compressibility has again been reached, when the operator swings the lever 42, shuts 0d the power, and simultaneouslyreleases the pre sure in the cylinder 2 by opening the valve 22 and permitting the plunger 3 to begin to descend instantly.

I have found that when the pressure is released upon the bobbins and the cylinder 2 is being depressed, that the resiliency of the compressed bobbins is ofttimes so great as to strip the threads from the central stem 47, forcing the yoke 50 and nut 51 with great force upwardly against the under surface of the head 8, and the rebound therefrom is apt to injure the workman. It will be understood that great pressure is applied, often amounting to from fifteen to eighteen tons upon these bobbins, and this strain must be taken up by the stem 47, and the restraining nut 51 until the bobbins are set by steaming and drying as above explained. Therefore, in further equipping the hydraulic press with my invention to cooperate with the bobbin cage, I provide a guard 56 in the form of a plate secured in any suitable manner at the front of the head 8 and projecting downwardly a few inches to prevent any rebound outwardly, so that an operator or workman would not be injured in case the nut 51 or stem 4L7 gave way and was forced upwardly, as just noted. It will also be understood that the hydraulic press is provided with any usual and custon'iary safety valve, which valve may also be set to blow off when the desired pressure has been applied as, say, at twenty tons, so that if, for example, the pressure to be applied to the bobbins is eighteen tons, and the operator for any reason neglects to turn the handle 42 to shut off power and release pressure when eighteen tons has been applied, the press will automatically cease any further increase when twenty tons pressure has been reached. Such safety valve being of well known type and in common use, with hydraulic presses, and not being a part of my present invention, 1 have not shown the same herein.

lt will thus be seen that l have provided an apparatus which is capable of great speed of operation and which enables the operator, by the manipulation of a single lever, to turn on the supply of power, and to shut it elf and release the plunger 3, permitting the same to descend the instant that the iudi cator 5st registers the desired and predetermined extent of pressure which is to be applied, permitting the operator at all times to have his hands free to manipulate and tighten the nut 51 on the bobbin cage, in order to hold the yoke 50 thereon in its compressed position and hold the bobbins under compression when they are removed from the press. It will be appreciated by those skilled in the art of handling such bobbin cages that my invention provides means to uniformly compress successive cages and thereby secure uniform results, as well as even operation of the machines subsequently emplloying such bobbins. All danger of spoiling a cage full of bobbins by overpressing is eliminated, this being one of the chiliculties often experienced in pressing bob bins by means of a screw press, particularly a power operated screw press, it being impossible to tell with accuracy the degree of pressure being applied by such means, and often times an entire cage full of bobbins will be ruined. By means of my apparatus it is impossible to spoil the bobbins as the safety valve will automatically prevent too great a pressure from being applied, and also the arrangement of the operating handle which shuts off power and. releases the pressure simultaneously, permits of a quick and speedy compression of successive sets of bobbins at the same pressure or at varying pressures, as desired.

l-laving described my invention, what I claim as new and desire to secure by Letters Patent is:

In a machine of the class described, fluid pressiu'e means having mechanism to control the supply thereof, a bobbin cage adapted to carry bobbins having two projecting spindles, each carrying a plurality of bobbins, said pressure means being adapted to apply pressure on said cage and compress a plurality of bobbins on each spindle simultaneously, means to hold said cage so compressed, means to release the pressure, in combination with manually controlled mechanism to stop the supply of fluid pressure and to relieve the pressure from the bobbin cage simultaneously by a single movement.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

ALFRED B. MORSE.

"Witnesses EDWARD MAXWELL, James R. Honnnn.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

